“I would not rule it out... Something about the mineral elements in the tunnels was peculiar when I did the lab tests. It was different from the rock at the tunnel entrance and from the riverbed, but I didn’t have what I needed to parse out how precisely.” In other words, “I think the energy will be localized to specific locations, but there could be several.”

Benjiro opens his notebook to once again track their movements as the doctor resumes the lead. His attention to direction lessens as the path becomes more direct and downward. With broader focus, he certainly picks up on the change in airflow. “...that is definitely not normal. The air current should not alternate this rapidly so far from the surface.”